Image updater removes transformers in kustomization.yaml

[ghost]

Describe the bug
Overwriting parts of kustomization.yaml file wich not supposed to be touched. In this case is transformers. This issue is similar to #247

To Reproduce
Add to kustomization.yaml:

transformers:
- transformers/labels.yaml

The updater will remove it if the image is updated.

Expected behavior
Image updater doesn't remove transformers section in kustomization.yaml

Additional context
N/A

Version
0.10.1

Logs
N/A

[jannfis]

This is probably due to the fact that we import & use Kustomize v2.x - probably we should go for similar version that Argo CD uses (which is v4 as of Argo CD v2.1).

[thuandt]

It removed my KSOPS secret generator when I tried to write-back into kustomization.yaml file